See here, what you've done is you've counted the amount of items (you, personally, not Python), which is four, and just said that there are four items. But what if you then add another item to the list? Then there will be five items, but your code will still just print "There are 4 items in the suitcase."

They want you to use "len(list_name)" in place of "4", which will return the amount of items in the Suitcase list, so that if the amount of items changes, then the phrase that is printed will be updated accordingly.